One-pot method for the synthesis of sulfonated poly(1,3,4-oxadiazoles) based on 4,4’-oxydibenzoic acid

A series of new copolymers of poly(1,3,4-oxadiazole) that contain side protogenic sulfo groups are synthesized by the direct copolycondensation of terephthalic and 4,4’-oxydibenzoic acids and hydrazine sulfate in oleum. Variation in the polycondensation conditions makes it possible to synthesize cop...

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Bibliographic Details
Published in:Polymer science. Series B 2016-09, Vol.58 (5), p.529-540
Main Authors: Yashchenko, V. S., Pap, A. A., Matveenko, Yu. V., Ol’khovik, V. K.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Copolymers
Hydrazines
Oxadiazoles
Polycondensation
Polymer Sciences
Strength
Sulfates
Synthesis
Synthesis (chemistry)
Thermal stability
Water absorption
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Summary:A series of new copolymers of poly(1,3,4-oxadiazole) that contain side protogenic sulfo groups are synthesized by the direct copolycondensation of terephthalic and 4,4’-oxydibenzoic acids and hydrazine sulfate in oleum. Variation in the polycondensation conditions makes it possible to synthesize copolymers containing phenylene moieties with either 4-sulfo-10,10-dioxophenoxatiine or 4,4’-oxybis(3-sulfophenyl) moieties or a combination of the three moieties. This approach permits easy control over the physicochemical properties of the copolymers and the amount of protogenic sulfo groups. It is shown that the introduction of sulfonated moieties into copolymer molecules makes it possible to obtain materials with high values of ionexchange capacity (1.5 mmol/g) and water absorption (110%), while the strength and thermal stability inherent in poly( p -phenylene 1,3,4-oxadiazoles) remain intact.
ISSN:1560-0904
1555-6123
DOI:10.1134/S1560090416050134